This is the 6130th most frequent Spanish word.
alta
"Alta" means "tall" or "high" in English.
In this sentence, 'alta' is used as an adjective to indicate the height of the mountain.
La montaña es muy alta.
The mountain is very tall.
Here, 'alta' modifies 'calidad', describing the level of quality desired.
Ella pidió una alta calidad en los materiales.
She requested high quality in the materials.
In this context, 'alta' is part of the phrase 'dar de alta', used idiomatically to mean releasing a patient after recovery.